Aftermarket FI options for Type 4 motors 2056 or larger, Who here has gone this route and is it worth it? What options do we have? Options

[DRPHIL914]

i started looking into this 2 years ago when i was planning my rebuild motor after the drpped valve seat on the OEM motor.
I ended up building a nice 2056 with increased compression, brand new heads, counter balanced crank and of course the cam is performance minded as well.
to start i installed the d-jet and later last year i added a 50mm bored out stock throttle body from Tangerine/Chris Foley. Yes this helped a great deal, but we are still limited due to the d-jet and the MPS. So there are a few people out there that make ITB( independant throttle body) that could be used.
One is Jenvey, and i see that PMB is carrying those. It looks ike they are mated to what ever IDF intake manifold you choose. there are 40, 45, 48 options. mated with 350cc injectors.
I am wondering other than the CB performance stuff that has been available for a while, others have come to the table, who here has played around with this ? over the years ive read a lot on others using the megasquirt and micro etc and it seemd they were very difficult to tune and set up with lots of problems, trial and error.

I am looking for advice on what to stay away from and what are the pitfalls and mistakes we can avoid before jumping into this.

Look forward to some input, thanks!!

Phil

[Jack Standz]

Well, I don't know how Edelbrock got it to work (or addressed the safety issues discussed above), but back in 2015 they put together this manifold that can use two DBW throttle bodies:

https://www.edelbrock.com/cross-ram-ls3-int...ifold-7141.html

Was seriously looking at getting one for an LS4 motor eventually going into a Fiero, but they don't offer it for the cathedral heads (and it's pricey, although less now than when introduced). So, it's not a type iv motor, but could be considered a proof of concept for using dual DBW throttle bodies on one motor.

And of course you can always fool around with trying to use mechanical throttle bodies and mechanical linkage if the DBW ones give you heartburn.

[Superhawk996]

Well, I don't know how Edelbrock got it to work (or addressed the safety issues discussed above), but back in 2015 they put together this manifold that can use two DBW throttle bodies:

https://www.edelbrock.com/cross-ram-ls3-int...ifold-7141.html

They didn’t. They are selling you a manifold. If that manifold happens to fit GM throttle bodies that operate throttle by wire, so be it.

It’s up to you to figure out how to make the throttle bodies work. If you use a GM ECU that’s a coincidence. In the end, Edelbrock will bear no responsibility for what the end user does with their parts.

If they were selling a complete, functional system inclusive of an ECU and software they would open themselves up to functional safety implications and potential liability. Even then I’m not sure.

Currently there is a company CommaAI that is basically selling a way to hack your car to create or modify Level 2 ADAS features that can affect driver and vehicle safety. As of yet, there has been no accident or litigation. When the time comes, they will claim the driver was ultimately responsible for the vehicle safety and that they only made the hardware and the code available. How it at will turn out in court is yet to be seen.

From install PDF:
“NOTE: Proper installation is the responsibility of the installer. Improper installation may result in poor performance and engine or vehicle damage.”

Surprised it doesn’t also have the usual “for off-road use only” disclaimer too.